PVC Xinjiang Tianye SG‑8
PVC Xinjiang Tianye SG‑8
Material Introduction: PVC Xinjiang Tianye SG‑8 is a polyvinyl chloride resin produced by suspension‑polymerization process. It is famous for good product transparency, excellent processing flowability, favorable chemical stability and easy‑processing performance.
Main Applications
Transparent products: transparent sheets, phonograph records, food‑contact packaging containers (relevant hygienic standards shall be complied with), etc.
Injection‑molded products: complex‑shaped pipe fittings, household‑appliance housings, toys, etc.
Plastic alloys: used as blending resin for PVC alloys and other polymer materials.
Other fields: profiles, soft films and so on.
Physical Properties
| Test Item | Test Standard | Unit | Reference Value / Range |
|---|---|---|---|
| Average Degree of Polymerization | ‑ | P | 650‑740 |
| Viscosity Number | GB/T 3401 | mL/g | 73‑86 |
| K‑Value | GB/T 3401 | ‑ | 55‑59 |
| Bulk Density (Premium Grade) | ‑ | g/mL | ≥0.50 |
| Volatile Matter Content (including water) (Premium Grade) | ‑ | % | ≤0.40 |
| Sieve Residue (0.25 mm sieve) (Premium Grade) | ‑ | % | ≤2.0 |
| Sieve Residue (0.063 mm sieve) (Premium Grade) | ‑ | % | ≥95 |
| Fish‑eye Count (Premium Grade) | ‑ | pcs/400cm² | ≤30 |
| Plasticizer Absorption (Premium Grade) | ‑ | g/100g resin | ≥12 |
| Whiteness (160℃, 10 min) (Premium Grade) | ‑ | % | ≥75 |
| Residual Vinyl Chloride Monomer (Industrial Grade, Premium Grade) | ‑ | μg/g (ppm) | ≤5 |
| Residual Vinyl Chloride Monomer (Food‑contact Grade, Premium Grade) | ‑ | μg/g (ppm) | ≤5 |
Processing Parameters
| Process Step / Parameter | Unit / Condition | Reference Value / Range | Remarks & Description |
|---|---|---|---|
| Material Pre‑treatment | ‑ | Normally no drying required | Proper drying is needed if moisture‑absorbed |
| Injection Molding Barrel Temperature | ‑ | Note: PVC is heat‑sensitive; thermal stabilizer must be added | |
| Rear zone (Feed section) | ℃ | 140‑155 | For reference; adjust according to formulation and equipment |
| Middle zone (Compression section) | ℃ | 155‑165 | For reference; adjust according to formulation and equipment |
| Front zone (Metering section) | ℃ | 165‑175 (do not exceed 180 °C) | For reference; adjust according to formulation and equipment |
| Injection Nozzle Temperature | ℃ | 160‑170 | For reference; adjust according to formulation and equipment |
| Melt Temperature | ℃ | 160‑180 | Never exceed 210 °C to avoid decomposition |
| Injection Pressure | bar | up to 1500 | |
| Screw Speed | rpm | 20‑50 | Avoid high speed to prevent shear overheating |
| Mold Temperature | ℃ | 30‑50 | |
| Extruder Barrel Temperature (Example) | ‑ | Note: PVC is heat‑sensitive; thermal stabilizer must be added | |
| Feed Section (Zone 1) | ℃ | 145‑160 | For reference; adjust according to formulation and equipment |
| Compression Section (Zone 2) | ℃ | 160‑170 | For reference; adjust according to formulation and equipment |
| Metering Section (Zone 3) | ℃ | 170‑180 | For reference; adjust according to formulation and equipment |
| Extrusion Die Temperature | ℃ | 175‑185 | For reference; adjust according to formulation and equipment |
| Thermal Stability Reminder | ‑ | Stabilizer addition is mandatory | PVC decomposes easily under over‑heating or long‑term heat exposure. Sufficient high‑efficiency thermal stabilizer shall be added into formulation. |
Disclaimer: All above data is for reference only.
